In the centre of the base of the booster seat, underneath the material flap, you will find asmall button. Pressing this will release the harness ard allow you to manoeuvre the harnessinto a position that best fitsour child. As your child growsremove the support pad andadjust the harness by removingthe shoulder straps individuallyfrom the metal slider plate on thelback of the seat and insertingthem through the higher slotsThen re-attach the shoulderstraps individually